6 Branch manifold problem Please help!

[Super_ted]

hi guys,

i have recently purchased a six branch manifold from Hot tuning as advised by fellow members of E30 zone community.

i got an exhaust specialist to put the new manifold on to the car expecting the exhaust note to be alot more grunty and to my surprise it was alot louder when i had the stock manifold on the car??

the mid section and back box are already stainless steel. My old e30 320i had a full system including a 6 branch manifold which sounded amazing. i thought this being a 325i should have sounded even better.

The engine does seem to however be running alot smoother on idle and i think it is breathing alot better too. Power increase wise it may have increased by a few BHP but nothing to sing and dance about unfortunately. Also between 2-3rpm there is quite a loud tappit noise coming from the manifold. I say it sounds like tappits but the engine is smooth sounding and was not like this before the pipe was fitted.

Can anyone please shed some light on this situation for me as i have shelled out almost £320 for this install and am not too pleased with the outcome. Any advice will be greatly apreciated.

thanks

Surj

[fuzzy]

a slight blow can sound like a tap tap tap noise. perhaps it hasnt been fitted properly

[cliffybabe]

6 branch aint about a louder exhuast system first off

Its designed to give better performance by how it takes the gas's away from the lump, My scorpion got a bit quiter after fitting my alpina 6branch

After come tip of bedding in the 6branch u may notice a difference in exhuast note, what exhaust system r u using for the rest of the system??

ur tapets could just need adjusting i have never heard of a 6branch causing tappet issue's

[dips346]

you will hear the tappets more because of the 6 branch as its thinner walls and the design of it

[Super_ted]

The car had a powerflow back box when i bought it and i got an independent dude from a company called top gear to build the mid sectin onto the car.

Any suggests what i can do??

[GDBN]

You need a layer of carbon to build up on the inside. Wait for about 500 miles and the exhaust note should deepen a bit.

G

[cliffybabe]

Top gear, Now i've seen one of them firms near streatham area, they look alright

[zaust]

You need a layer of carbon to build up on the inside. Wait for about 500 miles and the exhaust note should deepen a bit.

G

If not more mileage than that. You will have a pinging noise as the gases run through it until then. Don't panic it's normal.

[78dude]

Isnt it best to use an stainless steel exhaust manifoild when you have tuned the engine with an perfomance camshaft? I have heard some roumors that you loose torque if you use it on a stanard engine....

[cliffybabe]

here's the link to the same thread thats been posted in tech help

http://www.e30zone.net/modules.php?name ... ic&t=97075

[Simon13]

all M20's sound quieter with a 6 branch fitted thats normal. As dips said the valve gear can be heard alot more. Or the tick of top end. Even good condition top ends tap